Spring shade-roller



(No Model.)

9. BfMAssEY. SPRING SHADE ROLLER. No. 299,239. Patented May 27, 1884.

@ETNE% QJINVEN TOR M! ,M@ /M ATTORNEYS.

More rarns nrnn'r rrrcn.

GIDEON B. MASSEY, OF MOUNT VERNON, NEIV YORK, ASSIGNOR OF ONE- THIRD TOLOUIS A. GARNETT, OF SAN FRANCISCO, CALIFORNIA.

SPRING SHADE ROLLER.

SPECIFICATION forming part of Letters Patent No. 299,239, dated May 27,188%.

Application filed October 23, 1888.

To aZZ whom it may concern:

Be it known that I, GIDnoN B. Miissnv, of Mount Vernon, in the county ofWVestehester and State of New York, have invented a new and usefulImprovement in Spring Shade- Rollers, of which the following is a full,clear, and exact description.

If a window-shade secured to aspring shaderoller of the usualconstruction is suddenly released, the spring revolves the roller withgreat rapidity, and the shade is wound on the roller, the bottom stickof the shade is carried around the roller, the cord attached to theshade is wound around the roller, and the spring in the roller isentirely uncoiled,thereby causing inconvenience and necessitating theunwinding of the cord and the readjusting of the roller.

The object of my invention is to provide a new and improved springshade-roller which is so constructed that when the shade is suddenlyreleased the roller will be checked and will be prevented from windingup the shade too far.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar letters of reference indicatecorresponding parts in all the figures.

Figure 1 is a longitudinal elevation of my improved spring-roller and awindow/shade attached to the same, parts being broken out and othersshown in section. Fig. 2 is a cross sectional elevation of the same onthe line 00 00, Fig. 1, showing the position of the roller when it islocked. Fig. 3 is.a cross-sectional elevation of the same on the line y3 Fig. 1, show ing the roller when it is unlocked. Fig. t is an end viewof the roller.

The spring shade-roller A is provided at one end with a ratchet-wheel,B, in the usual manner, and with endpivots, G and C, of which the formerextends into a Vertical slot, D, formed in a plate, E, secured in thewindow-casing. .A bent spring, F, secured to the window-casing, has itsfree end resting against the bottom of the pivot 0, thus press ing thesame upward. A pawl, G, is pivoted to the window-casing in such a mannerthat (No model.)

its free end can rest on the teeth of the ratchetwheel B, which pawl Gis pressed upward by a bent spring-wire, H, secured to the windowcasing,the free end of the said spring-wire being bent under the pawl G, so asto press the pawl upward against a stud, J, projecting from thewindow-frame. In place of the bent spring-wires F and H, band-springs orspiral springs can be used.

The operation is as follows: If the shade K, secured to the roller A. isto be unwound, the shade is pulled downward and the strain on the shadedraws the shade roller downward, whereby the spring F will be presseddownward and the ratchet-wheel B will be disengaged from the pawl G,thus permitting the roller to revolve in such a manner as to unwind theshade. As soon as the shade is released the spring F presses the pivot 0upward, thereby engaging the end of the pawl G with the teeth of theratchet-wheel B, whereby the roller will be locked in position. thewindow-shade is to be raised-that is, wound on its rollerthe shade ispulled downward slightly, so as to disengage the ratchet wheel 13 fromthe pawl G, and then the strain on the shade is diminished, so as topermit the roller to revolve; but the strain must still be sufficient tokeep the spring F depressed and the ratchet-wheel B lowered to such anextent that the ratchet-wheel cannot engagewith the pawl. If theshade-cord breaks or the shade the roller with great rapidity, as thespring F will throw the pivot O, the ratchet-wheel B, and thecorresponding end of the roller upward as soon as the shade is released,thus engaging the ratchet-wheel with the pawl G and locking the rollerin place; or, in other words, the shade can only be wound. on the rolleras long as there is sufficient strain on the shade to keep the spring Fdepressed, and as soon as the shade is entirely released the strain isremoved and the roller is locked in position, whereby the roller isprevented from raising the shade too rapidly and tearing the shade orwinding the cord on the roller, and at the same time the entireuncoiling of the spring is released suddenly, it will not be wound on I1 neeted with the spring in any suitable manner.

' adapted to engage with the ratchet-wheel, and

2. The combination, with a spring shade-r011- er, of a spring'forpressing the end provided with a ratchet-wheel. upward, the pawl G, asnew and desire to secure by Letters Patent adapted to engage with theratchet-wheel, the

1. The combination, with a spring shadecheek-stud J, and the spring H,for drawing roller, of a spring for pressing the end prothe pawl againstthe stud J, substantially as vided' with a ratchet-wheel upward, a pawlherein shown anddeseribed.

GIDEON B. MASSEY. a spring for holding the pawl raised to a eer- I\Vitnesses: tain position, substantially as herein-shown J Ann's T.GRAHAM, and described. 1 O. SEnG-wIeK.

in the roller is prevented. The pivot G is con- Having thus described myinvention, I claim

